List of the Cenozoic life of Montana

• , or fir trees Abies'' • †Abies alvordensis • †Abies concoloroides • †Abies laticarpa • Acer • †Acer bendirei • †Acer bolanderi • †Acer glabroides • †Acer minor • †Acer newberryi • †Acer oregonianum • †Acer scottiae • †Acer silberlingi • †Acheronodon • †Acheronodon garbani – type locality for species • Acipenser • †Acmeodon • †Acritohippus'' • †Acritohippus isonesus • †Acritoparamys • †Acritoparamys atavus – type locality for species • †Actinodonta • †Adjidaumo • †Adjidaumo intermedius – or unidentified comparable form • †Adjidaumo minimus – type locality for species • †Adunator • †Adunator ladae • †Aelurodon • †Aelurodon ferox – or unidentified comparable form • †Aelurodon montanensis – type locality for species • , or the long-necked camel. Heinrich Harder (1920). †Aepycamelus'' • †Aepycamelus stocki • †Agnotocastor • †Agnotocastor montanus • †Agriochoerus • †Agriochoerus maximus – type locality for species • †Agriochoerus minimus • †Agrostis • †Agrostis primaeva • †Ailanthus • †Ailanthus americana • Alangium • †Alangium thomae • †Alepidophora • †Alepidophora maxima – type locality for species • †Alismaphyllites • †Alismaphyllites grandifolius • Alnus • †Alnus jarbidgana • †Alnus protomaximowiczii • †Alnus relata • †Alphagaulus • †Alphagaulus pristinus • . Margret Flinsch (1932). †Amebelodon'' • †Amebelodon floridanus – or unidentified comparable form • Amelanchier • †Amelanchier couleeana • †Amelanchier covea • †Amentotaxus • †Amentotaxus campbelli • Amia • †Amia fragosa • †Amia uintaensis • †Ampelopsis • †Ampelopsis acerifolia • †Amphechinus • †Amphechinus horncloudi • †Amphicyon'' • †Amphicyon riggsi – type locality for species • †Amynodon • †Amynodon advenus – or unidentified comparable form • †Amyzon • †Anacodon • †Anacodon ursidens – or unidentified comparable form • Anas • †Anas platyrhynchos – or unidentified comparable form • †Ancenycteris • †Ancenycteris rasmusseni • †Anconodon • †Anconodon cochranensis • †Anconodon gidleyi – type locality for species • †Anemia • †Anemia elongata • †Angustidens'' • †Angustidens vireti – or unidentified comparable form • †Anisonchus • †Anisonchus oligistus • †Anisonchus sectorius • †Ansomys • †Ansomys hepburnensis – type locality for species • †Ansomys nexodens • †Antholithes • †Antholithes asterias – type locality for species • †Antholithes botryanthera – type locality for species • †Antholithes divaricanthera – type locality for species • †Antholithes explodens – type locality for species • †Antholithes glandulifera – type locality for species • †Antholithes onagracioides – type locality for species • †Antholithes tropaeoloides – type locality for species • †Antholithes tulipoidea – type locality for species • †Antholithes umbelloidea – type locality for species • †Antholithes urnanthera – type locality for species • †Antholithes zygomorpha – type locality for species • Antilocapra – or unidentified comparable form • †Antilocapra americana • †Aphelops • †Aphronorus • †Aphronorus fraudator – type locality for species • †Aphronorus orieli • †Apternodus • †Apternodus baladontus – type locality for species • †Apternodus mediaevus – type locality for species • †Araceaeites • †Araucaria • †Araucaria longifolia • †Archaeocyon'' • †Archaeocyon leptodus • †Archaeohippus • †Archaeolagus • †Archisyrphus – type locality for genus • †Archisyrphus opacus – type locality for species • †Arctocyon • †Arctocyon ferox • , or short-faced bear, with a human to scale †Arctodus'' • †Arctodus simus • †Arctostaphylos • †Arctostaphylos cuneata • †Ardynomys • †Ardynomys occidentalis – type locality for species • †Arretotherium • †Arretotherium acridens – type locality for species • Arundo • †Arundo pseudogoepperti • Arvicola • †Arvicola richardsonii • †aspera • †aspera aspera • tree, which is related to cashews †Astronium'' • †Astronium truncatum • †Athyana • †Athyana haydenii • †Atoposemys • †Atoposemys entopteros • †Aulolithomys • †Aulolithomys bounites – type locality for species • †Averrhoites • †Averrhoites affinis • †Avunculus • †Avunculus didelphodonti – type locality for species • †Axestemys • †Axestemys montinsana • water ferns Azolla'' • †Azolla elegans – type locality for species • †Azolla fragilis – type locality for species • †Azolla velus ==B==

• †Baioconodon • †Baioconodon denverensis – or unidentified comparable form • †Baioconodon engdahli – type locality for species • †Baioconodon nordicus – type locality for species • †Baiotomeus • †Baiotomeus douglassi • †Baiotomeus lamberti – type locality for species • †Bathygenys • †Bathygenys alpha – type locality for species • , or barberry †Berberis'' • †Berberis acanthoides • Berchemia • †Berchemia huanoides • †Beringiaphyllum • †Beringiaphyllum cupanioides • †Bessoecetor • †Bessoecetor septentrionalis • Betula • †Betula fairii • †Betula stevensoni • †Betula thor • †Betula vera • Bibio – or unidentified related form • Bison • †Bison bison • , also known as the giant bison or long-horned bison †Bison latifrons'' – or unidentified comparable form • †Bisonalveus • †Bisonalveus browni • †Blastomeryx • †Blastomeryx gemmifer • †Bootherium • †Borealosuchus • †Borealosuchus sternbergii • †Brachychampsa • †Brachycrus'' • †Brachycrus laticeps • †Brachyerix • †Brachyerix incertis • †Brachyrhynchocyon • †Brachyrhynchocyon dodgei • †Brachyrhynchocyon montanus – type locality for species • †Browniea • †Browniea serrata ==C==

• †Caesalpinites • †Caesalpinites acuminatus • †Caesalpinites coloradicus • †Calycites • †Calycites hexaphylla • †Camelops'' • †Camelops minidokae • †Camponotites • †Canavalia • †Canavalia eocenica • Canis • †Canis latrans • †Canis lupus • †Canna • †Canna flaccidafolia • †Carcinodon • †Carcinodon aquilonius • †Cardiospermum • †Cardiospermum terminalis • Carpinus • †Carpinus fraterna • †Carpinus lanceolata • †Carpites • †Carpites amygdaloides – type locality for species • †Carpites carumcarvi – type locality for species • †Carpites eludens – type locality for species • †Carpites gracilens – type locality for species • †Carpites paniculatus – type locality for species • †Carpites polygonoides • †Carpites pruniformis – type locality for species • †Carpites racemosus – type locality for species • †Carpites verrucosus • †Carpodaptes • †Carpodaptes hazelae – type locality for species • †Carpodaptes jepseni – tentative report • †Carpolestes'' • †Carpolestes nigridens – type locality for species • Carya • †Carya antiquorum • †Carya libbeyi • †Cassia • †Cassia fayettensis • †Cassia hesperia • †Cassia reticuloides • Castanea • †Castanea dolichophylla • †Castanea intermedia • †Castanea miomollissima • †Castanea spokanensis • †Castanea spolanensis • Castor • †Castor californicus • , or North American beaver †Castor canadensis'' • †Catalpa • †Catalpa rubyensis – type locality for species • †Catopsalis • †Catopsalis alexanderi • †Catopsalis waddleae • Ceanothus • †Ceanothus prespinosus • †Ceanothus variabilis • Cedrela • †Cedrela lancifolia • †Cedrela pteraformis • †Celastrus • †Celastrus typicus • Celtis • †Celtis aspera • †Celtis aspera (Newberry) • †Celtis chaneyi • †Celtis kansana • †Celtis mccoshii • †Celtis peracuminata • †Centetodon • †Centetodon kuenzii – type locality for species • †Centetodon magnus • Cercidiphyllum • †Cercidiphyllum arcticum • †Cercidiphyllum articum • †Cercidiphyllum crenatum • †Cercidiphyllum elongatum • †Cercidiphyllum genetrix • or redbud tree Cercis'' • †Cercis parvifolia • †Cercis spokanensis • †Cercocarpus • †Cercocarpus antiquus • †Cercocarpus beaannae • †Cercocarpus myricaefolius • †Chadrolagus • †Chadrolagus emryi • †Chaetoptelea • †Chaetoptelea microphylla • †Chamaecyparis • †Chamaecyparis linguaefolia • †Chamops • †Chamops segnis – or unidentified comparable form • †Champsosaurus'' • †Chiromyoides • †Chiromyoides potior • †Chisternon • †Chisternon interpositum – type locality for species • †Chriacus • †Chriacus baldwini • †Chriacus calenancus • †Chriacus pelvidens • †Chriacus punitor • †Chthonophis – type locality for genus • †Chthonophis subterraneus – type locality for species • †Cimexomys • †Cimexomys minor – type locality for species • †Cimolestes • †Cimolestes incisus • , or cinnamon tree Cinnamomum'' • †Cinnamomum sezannense • Cissus • †Cissus marginata • †Claenodon • †Claenodon montanensis • Clematis • †Clematis ellensburgensis • Cocculus • †Cocculus heteromorpha • †Colodon • †Colodon cingulatus • †Colodon kayi – type locality for species • †Colodon woodi – or unidentified comparable form • †Colpoclaenus • †Colpoclaenus keeferi – tentative report • †Colpoclaenus procyonoides – or unidentified comparable form • †Colubrina • †Colubrina asiatica – or unidentified comparable form • †Colubrina preelliptica • †Compsemys • †Compsemys victa • †Coniferites • †Coniferites conicus – type locality for species • †Coniferites ovatus – type locality for species • †Coniferites strobiliformis – type locality for species • . Othniel Charles Marsh (1892). †Coniophis'' – or unidentified comparable form • †Coniophis precedens • †Contogenys • †Contogenys ekalakaensis – type locality for species • †Contogenys sloani • †Conzattia • †Conzattia coriacea • †Copedelphys • †Copedelphys stevensoni – or unidentified comparable form • †Copedelphys titanelix – type locality for species • †Copemys • †Copemys lindsayi – type locality for species • †Coriphagus • †Coriphagus montanus – type locality for species • Cornus • †Cornus cornella • †Cornus hyperborea • †Cornus ovalis • †Corylus • †Corylus insignis • †Coryphodon • †Coryphodon proterus – type locality for species • †Cosmocomoidea • †Cosmocomoidea greenwalti – type locality for species • †Cosmocomoidea kootenai – type locality for species • †Cosmocomoidea rasnitsyni – type locality for species • †Cosoryx'' – tentative report • Crataegus • †Crataegus elwyni • †Crataegus pacifica • †Credneria • †Credneria daturaefolia • Crematogaster • †Crematogaster aurora – type locality for species • †Crustulus – type locality for genus • †Crustulus fontanus – type locality for species • †Cryptoryctes – type locality for genus • †Cryptoryctes kayi – type locality for species • Culiseta • †Culiseta kishenehn – type locality for species • †Culiseta lemniscata – type locality for species • †Cupidinimus • †Cupidinimus halli – type locality for species • †Cyclurus • †Cyclurus fragosus • †Cylindrodon – type locality for genus • †Cylindrodon fontis – type locality for species • †Cynodesmus • †Cynodesmus thooides – type locality for species • Cynomys • , or black-tailed prairie dog †Cynomys ludovicianus'' ==D==

• †Dalbergia • tree †Dalbergia retusa'' • †Daphoenictis – or unidentified comparable form • †Davidia • †Davidia antiqua • †Davispia – type locality for genus • †Davispia bearcreekensis – type locality for species • †Derrisemys – type locality for genus • †Derrisemys sterea – type locality for species • †Desmatochoerus • †Desmatochoerus hatcheri – type locality for species • †Desmatolagus – tentative report • †Deuterogonodon • †Deuterogonodon montanus – type locality for species • †Diceratherium • †Diceratherium annectens • †Diceratherium armatum • †Diceratherium radtkei – type locality for species • †Didymictis • †Dillerlemur • †Dillerlemur pagei – type locality for species • . Robert Bruce Horsfall (1913). †Dinictis'' • †Dinohippus • †Dioctria – tentative report • †Dioctria jamesi – type locality for species • †Diospyros • †Diospyros oregoniana • †Diphysa • †Diphysa presuberosa • †Diplodipelta – type locality for genus • †Diplodipelta reniptera • tree Dipteronia'' • †Dipteronia insignis • †Dissacus • †Dixella • †Dixella curvistyla – type locality for species • †Dixella eomarginata – type locality for species • †Dixella intacta – type locality for species • †Dixella spinilobata – type locality for species • Dolichoderus • †Dolichoderus dlusskyi – type locality for species • †Domnina • †Domnina gradata – or unidentified comparable form • †Domnina thompsoni – type locality for species • †Domninoides • †Dorraletes • †Dorraletes diminutivus • †Douglassciurus • †Douglassciurus jeffersoni – type locality for species • †Downsimus • †Dromomeryx'' • †Dromomeryx borealis • †Dryinoides – type locality for genus • †Dryinoides oxyrhachis – type locality for species • Dryopteris • †Dryopteris lakesi • †Dryopteris serrata ==E==

• †Ectocion'' • †Ectocion cedrus • †Ectocion collinus • †Ectoganus • †Ectoganus lobdelli • †Ectypodus • †Ectypodus aphronorus – type locality for species • †Ectypodus laytoni – or unidentified comparable form • †Ectypodus lovei • †Ectypodus powelli – or unidentified comparable form • †Ectypodus szalayi – type locality for species • †Ellipsodon • †Ellipsodon lemuroides • †Elomeryx'' – tentative report • †Elphidotarsius • †Elphidotarsius florencae – type locality for species • †Elphidotarsius russelli • †Elpidophorus • †Elpidophorus elegans • †Elpidophorus minor – type locality for species • †Entoptychus • †Entoptychus montanensis • †Eoanaphes – type locality for genus • †Eoanaphes stethynioides – type locality for species • †Eoanomala – type locality for genus • †Eoanomala melas – type locality for species • †Eoconodon • †Eoconodon hutchisoni • †Eoconodon nidhoggi • †Eoeustochus – type locality for genus • †Eoeustochus borchersi – type locality for species • †Eoeustochus kishenehn – type locality for species • †Eoformica • †Eoformica brevipetiola – type locality for species • †Eoformica latimedia – type locality for species • †Eoformica pinguis • †Eogyropsylla • †Eogyropsylla paveloctogenarius – type locality for species • †Eolestes • †Eolestes ramosus – type locality for species • †Eolestes syntheticus • †Eotitanops • †Epicyon'' • †Epicyon haydeni • †Epihippus • †Epihippus gracilis – or unidentified comparable form • †Epoicotherium • †Epoicotherium unicum • †Equisetum • †Equisetum aquatile – type locality for species • †Equisetum arcticum • †Equisetum octangulatum • Equus • , or Mexican horse †Equus conversidens'' – or unidentified comparable form • †Equus proversus • Erucius – tentative report • †Erucius lewisi – type locality for species • †Eucastor • †Eucastor tortus • †Eucommia • †Eucommia montana • †Eucommia serrata • †Eudaemonema • †Eudaemonema cuspidata – type locality for species • †Euhapsis – tentative report • †Eumys • †Eumys brachyodus • †Eumys elegans • †Eumys parvidens – or unidentified comparable form • †Euonymus'' • †Euonymus pacificus • †Euoplocyon • †Euoplocyon brachygnathus • †Euroxenomys • †Euroxenomys inconnexus – type locality for species • †Eutypomys • †Eutypomys inexpectatus – or unidentified comparable form • †Eutypomys montanensis – type locality for species • †Eutypomys parvus • Exbucklandia • †Exbucklandia oregonensis • Exechia – or unidentified related form • †Exostinus • †Exostinus lancensis ==F==

• †Fagopsis • †Fagopsis longifolia • Ficus • †Ficus affinis • †Ficus artocarpoides • †Ficus planicostata • †Ficus subtruncata • Fidiobia • cypress tree Fokienia'' • †Fokienia catenulata • Formica • †Formica annosa – type locality for species • †Fraxinus • †Fraxinus brevialata • †Fraxinus eocenica • †Fraxinus flexifolia • †Fraxinus rupinarum ==G==

• †Galbreathia • †Galbreathia bettae • †Gelastops • †Gelastops parcus – type locality for species • Geochelone • †Geochelone primaeva – type locality for species • Gerrhonotus – or unidentified comparable form • †Gingerichia – type locality for genus • †Gingerichia geoteretes – type locality for species • Ginkgo • †Ginkgo adiantoides'' • Gleichenia • †Gleichenia hesperia • Glyptostrobus • †Glyptostrobus nordenskioldi • †Glyptostrobus oregonensis • †Goniacodon • †Goniacodon levisanus • †Gregorymys • †Gregorymys douglassi – type locality for species • †Gripholagomys – tentative report ==H==

• †Habrosaurus • †Habrosaurus dilatus • †Hamamelites • †Hamamelites inaequalis • †Haplaletes • †Haplaletes andakupensis • †Haplaletes disceptatrix – type locality for species • †Haplomylus • †Haplomylus palustris – type locality for species • †Helaletes • †Helaletes nanus • †Heliscomys • †Heliscomys gregoryi • †Heliscomys mcgrewi – or unidentified comparable form • †Heliscomys ostranderi • Helius • †Helius constenius – type locality for species • †Helodermoides'' – type locality for genus • †Helodermoides tuberculatus – type locality for species • †Hendryomeryx • †Hendryomeryx defordi – or unidentified comparable form • †Herpetotherium • †Herpetotherium fugax • †Herpetotherium knighti – or unidentified comparable form • †Herpetotherium valens • †Hesperhys • †Hesperhys vagrans • Hesperinus – or unidentified related form • . Robert Bruce Horsfall (1913). †Hesperocyon'' • †Hesperocyon gregarius • †Heteraletes • †Heteraletes leotanus • †Hiodon • †Hiodon consteniorum – type locality for species • Holmskioldia • †Holmskioldia speiri • †Holopogon • †Holopogon archilestes – type locality for species • Homo • †Homo sapiens • , or scimitar cat †Homotherium'' • †Homotherium serum • †Huerfanodon – or unidentified comparable form • †Hutchemys – type locality for genus • †Hutchemys rememdium – type locality for species • †Hyaenodon • †Hyaenodon crucians • Hydrangea • †Hydrangea knowltoni • †Hydromystria • †Hydromystria expansa • †Hyopsodus • †Hyopsodus sholemi • †Hypertragulus'' • †Hypertragulus calcaratus • †Hypisodus • †Hypisodus minimus • †Hypohippus • †Hypohippus osborni – or unidentified comparable form • †Hypolagus • †Hypolagus vetus • †Hypsiops • †Hypsiops breviceps – type locality for species • †Hyrachyus • †Hyrachyus douglassi – type locality for species • †Hyracodon • †Hyracodon medius • †Hyracodon priscidens ==I==

• †Ictidopappus • †Ictidopappus mustelinus – type locality for species • †Ignacius • †Ignacius frugivorus • †Ilex • †Ilex acuminata – later renamed Ilex mormonica • †Ilex mormonica – type locality for species. Formerly known as Ilex acuminata. • †Intyrictis • †Intyrictis vanvaleni • †Ischyrhiza – or unidentified comparable form • †Ischyrhiza avonicola • †Ischyromys'' • †Ischyromys douglassi – type locality for species • †Ischyromys typus • †Ischyromys veterior – type locality for species • Isoetes • †Isoetes trullata – type locality for species • †Isoetites • †Isoetites horridus • Isonychia • †Isonychia alderensis – type locality for species ==J==

• †Jepsenella – type locality for genus • †Jepsenella praepropera – type locality for species • †Judithemys • †Judithemys backmani • †Juglandicarya • †Juglandiphyllites • †Juglandiphyllites glabra • Juglans • also known as the Persian or English walnut †Juglans regia'' – or unidentified comparable form • †Juglans taurina • Juniperus • †Juniperus nevadensis ==K==

• †Kerria • †Kerria antiqua • †Kimbetohia • †Kimbetohia mziae • tree Koelreuteria'' • †Koelreuteria arnoldi • †Koelreuteria bipinnatoides • †Ktunaxia – type locality for genus • †Ktunaxia jucunda – type locality for species • †Kukusepasutanka • †Kukusepasutanka schultzi ==L==

• †Labidolemur – type locality for genus • †Labidolemur kayi – type locality for species • Lasius • †Lasius glom – type locality for species • †Lastrea • †Lastrea goldiana • †Latiblattella • †Latiblattella avita – type locality for species • †Laurophyllum • †Laurophyllum perseanum • , or laurel trees Laurus'' • †Laurus socialis • †Leguminosites • †Leidymys • †Leipsanolestes • †Leipsanolestes siegfriedti • Lemmiscus • †Lemmiscus curtatus • Lepisosteus • †Lepisosteus occidentalis • †Leptacodon • †Leptacodon munusculum – type locality for species • †Leptacodon packi – or unidentified comparable form • †Leptacodon proserpinae • †Leptacodon tener • †Leptarctus – type locality for genus • †Leptarctus primus – type locality for species • †Leptauchenia • †Leptauchenia decora • †Leptauchenia major • †Leptictis • †Leptochoerus • †Leptocyon • †Leptocyon douglassi – type locality for species • †Leptodontomys • †Leptomeryx'' • †Leptomeryx esulcatus • †Leptomeryx evansi • †Leptomeryx mammifer • †Leptomeryx speciosus • †Leptomeryx yoderi – or unidentified comparable form • †Leptonysson – type locality for genus • †Leptonysson basiliscus – type locality for species • †Leptoreodon • †Leptoreodon marshi • †Leucaena • †Leucaena californica • †Lignimus • †Limnenetes • †Limnenetes platyceps – type locality for species • †Limnoecus • Lindera • †Lindera obtusata • †Lisserpeton • †Lisserpeton bairdi • †Litaletes • †Litaletes disjunctus – type locality for species • †Lithornis'' • †Lithornis celetius – type locality for species • †Litocherus • †Litocherus lacunatus • †Litocherus notissimus – type locality for species • †Litomylus • †Litomylus dissentaneus – type locality for species • †Litomylus ishami – or unidentified comparable form • †Litomylus orthronepius • †Loxolophus • †Loxolophus pentacus • †Loxolophus schizophrenus • †Lutetialestes – type locality for genus • †Lutetialestes uniformis – type locality for species • Lynx • , or bobcat †Lynx rufus'' ==M==

• †Machaerosaurus • †Machaerosaurus torrejonensis • flower Magnolia'' • †Magnolia borealis • †Magnolia magnifolia • Mahonia • †Mahonia hakeaeformis • †Mahonia limirivuli • †Mahonia lobodonta • †Mahonia obliqua • †Mahonia retculata • †Mahonia reticulata • †Mahonia simplex • †Mahonia subdenticulata • †Mammut • †Mammut americanum • †Mammuthus • †Mammuthus columbi • , or American mastodon (right), and a Mammuthus primigenius, or wooly mammoth (left) †Mammuthus primigenius'' • Marchantia • †Marchantia lignitica • †Marchantia pealei • Marmota • †Marmota flaviventria • †Marquettia • †Marquettia metzeli – type locality for species • Martes • †Martes kinseyi – or unidentified comparable form • †Mcconichthys – type locality for genus • †Mcconichthys longipinnis – type locality for species • †Megacerops'' • †Megacerops kuwagatarhinus – type locality for species • †Megahippus • †Megalagus • †Megalagus brachyodon – type locality for species • †Megalagus dawsoni – type locality for species • †Megalagus turgidus – or unidentified comparable form • †Megalonyx • †Megalonyx jeffersonii • †Megantereon • †Megatylopus • †Megatylopus gigas • †Melastomites • †Melastomites montanensis • †Meniscomys • †Menodus • †Merriamoceros • †Merychippus • †Merychippus sejunctus • †Merychyus • †Merychyus arenarum – or unidentified comparable form • †Merychyus smithi • †Merycochoerus • †Merycochoerus chelydra • †Merycodus'' • †Merycodus necatus – or unidentified comparable form • †Merycoides • †Merycoides longiceps • †Merycoidodon • †Merycoidodon culbertsoni – or unidentified comparable form • †Mesodma • †Mesodma ambigua – or unidentified comparable form • †Mesodma formosa • †Mesodma garfieldensis – type locality for species • †Mesodma pygmaea – type locality for species • †Mesodma thompsoni • †Mesogaulus • †Mesogaulus ballensis – type locality for species • †Mesogaulus douglassi • †Mesohippus • †Mesohippus bairdi • †Mesohippus westoni – type locality for species • mammal Mesoreodon †Mesoreodon • †Mesoreodon chelonyx • †Mesoreodon minor – type locality for species • †Mesoscalops • †Mesoscalops montanensis – type locality for species • †Metadjidaumo • Metasequoia • †Metasequoia occidentalis • †Metopium • †Metopium metopioides • †Miacis'' – report made of unidentified related form or using admittedly obsolete nomenclature • †Microcosmodon • †Microcosmodon harleyi – type locality for species • †Micropternodus • †Micropternodus borealis – type locality for species • Microtus • †Microtus pennsylvanicus – or unidentified comparable form • †Mimatuta • †Mimatuta minuial • †Mimatuta morgoth – type locality for species • †Mimetodon • †Mimetodon silberlingi – type locality for species • †Mimosites • †Mimosites acaciafolius • †Mimotricentes • †Mimotricentes fremontensis • †Mimotricentes tedfordi – tentative report • †Minerisporites • †Minerisporites glossoferus (Dijkstra) n. comb. • †Miniochoerus – tentative report • †Miohippus'' – type locality for genus • †Miohippus anceps – tentative report • †Miohippus annectens – tentative report • †Miohippus equiceps – tentative report • †Miohippus gemmarosae – or unidentified comparable form • †Miohippus grandis • †Miohippus obliquidens • †Miohippus taxus – type locality for species • †Mionictis – tentative report • †Miopsyche – tentative report • †Miopsyche rubiensis – type locality for species • †Mnium • †Mnium montanense • †Mojavemys • †Monosaulax • †Monosaulax pansus – tentative report • †Montanatylopus • †Montanatylopus matthewi – type locality for species • †Mookomys • †Mookomys formicarum – or unidentified comparable form • †Mookomys thrinax – type locality for species • Morus • †Muscites • †Muscites gracilens • Mustela • †Mustela frenata • †Mustelavus • †Mustelavus priscus • Myrica • †Myrica lignitum • †Myrica mormonensis • †Myrica serrulata • †Myrmecoboides • †Myrmecoboides montanensis – type locality for species • †Myrtophyllum • †Myrtophyllum torreyi • †Mystipterus • †Mytonolagus • †Mytonolagus petersoni – or unidentified comparable form ==N==

• †Namatomys • †Namatomys lloydi – type locality for species • †Nannodectes • †Nannodectes gidleyi – or unidentified comparable form • †Nannodectes intermedius • †Nannodectes simpsoni – or unidentified comparable form • †Nanodelphys • †Nanodelphys hunti • †Nanotragulus • †Navajovius • †Nelumbago • †Nelumbago montanum • †Nelumbo • . Robert Bruce Horsfall (1913). †Neohipparion'' • †Neoplagiaulax • †Neoplagiaulax donaldorum – type locality for species • †Neoplagiaulax grangeri – type locality for species • †Neoplagiaulax hunteri – type locality for species • †Neoplagiaulax kremnus • †Neoplagiaulax mckennai • †Neoplagiaulax nelsoni – type locality for species • †Niglarodon • †Niglarodon blacki – type locality for species • †Niglarodon koerneri – type locality for species • †Niglarodon loneyi – type locality for species • †Niglarodon progressus • †Nordenskioldia • †Nordenskioldia borealis • water lily †Nuphar'' • †Nuphar advenoides • †Nyctitherium • †Nymphaeites • †Nymphaeites nevadensis • †Nyssa • †Nyssa alata • †Nyssa borealis • †Nyssa crenata ==O==

• †Ocajila • †Ocajila makpiyahe – or unidentified comparable form • †Odaxosaurus • †Odaxosaurus piger • deer Odocoileus'' – or unidentified comparable form • †Ogmophis • †Ogmophis arenarum – type locality for species • Olar • †Olar buccinator • †Oligodontosaurus • †Oligodontosaurus wyomingensis – or unidentified comparable form • †Oligoryctes • †Oligoryctes altitalonidus • †Oligoryctes cameronensis • †Oligoscalops • †Oligotheriomys • †Oligotheriomys senrudi • , or muskrat Ondatra'' • †Ondatra xibethicus • †Ondatra zibethicus • †Onoclea • †Onoclea hesperia • †Onychodectes • †Onychodectes tisonensis • †Opisthotriton • †Opisthotriton gidleyi – type locality for species • †Opisthotriton kayi • Oreohelix • †Oreolagus • †Oreolagus nevadensis • †Oreonetes • †Oreonetes anceps • †Oreonetes douglassi • †Osmanthus • †Osmanthus praemissa • ferns †Osmunda'' • †Osmunda greenlandica • †Osmunda macrophylla • †Osmunda occidentalis • Ostrya • †Ostrya oregoniana • †Otarocyon • †Otarocyon macdonaldi • †Oxyacodon • †Oxyacodon apiculatus • †Oxyacodon ferronensis • †Oxyacodon marshater • †Oxyclaenus • †Oxyclaenus pugnax • . Robert Bruce Horsfall (1913). †Oxydactylus'' • †Oxydactylus lacota – or unidentified comparable form • †Oxyprimus • †Oxyprimus erikseni – type locality for species ==P==

• †Paciculus • †Pagonomus – or unidentified comparable form • †Palaechthon – type locality for genus • †Palaechthon alticuspis – type locality for species • †Palaechthon woodi – or unidentified comparable form • †Palaeictops • †Palaeocarpinus • †Palaeocarpinus joffrenses • †Palaeogale • †Palaeogale sectoria • †Palaeohypnum • †Palaeohypnum beckeri • †Palaeolabrus • †Palaeolabrus montanensis – or unidentified comparable form • relative Palaeolagus †Palaeolagus • †Palaeolagus burkei • †Palaeolagus haydeni • †Palaeolagus hypsodus • †Palaeolagus intermedius • †Palaeolagus temnodon – type locality for species • †Palaeophytocrene • †Palaeoryctes • †Palaeosinopa • †Palaeosinopa didelphoides – or unidentified comparable form • †Palaeosyops'' • †Palaeosyops fontinalis • †Palaeoxantusia • †Palaeoxantusia fera • †Palatobaena • †Palatobaena bairdi • †Palenochtha – type locality for genus • †Palenochtha minor – type locality for species • †Paleonelumbo • †Paleonelumbo macroloba • †Paleonuphar • †Paleonuphar hesperium • †Paleopsephurus – or unidentified comparable form • †Paleotomus • †Paleotomus senior – type locality for species • Paliurus'' • †Paliurus dumosus • †Paliurus florissanti • †Pandemonium • †Pandemonium dis – type locality for species • †Pantolambda • †Pantolambda intermedius – type locality for species • †Pantomimus – type locality for genus • †Pantomimus leari – type locality for species • †Paracosoryx • †Paradjidaumo • †Paradjidaumo spokanensis – type locality for species • †Paradjidaumo trilophus • †Paramerychyus • †Paramerychyus harrisonensis • Paramylodon †Paramylodon • †Paramylodon harlani • †Paramys • †Paramys relictus • †Paranymphaea • †Paranymphaea crassifolia • †Parapliosaccomys • †Parapliosaccomys annae – or unidentified comparable form • †Pararyctes • †Pararyctes pattersoni • †Paratomarctus • †Paratomarctus temerarius • †Parectypodus • †Parectypodus sinclairi – type locality for species • †Parectypodus sylviae • †Pareumys – tentative report • †Parictis • †Parictis montanus • †Paromomys • †Paromomys depressidens – type locality for species • †Paromomys maturus – type locality for species • †Parthenocissus • †Parthenocissus ursina • †Parvericius • †Parvericius montanus • †Paulownia • †Paulownia columbiana • †Paulownia thomsoni • †Peltosaurus'' • †Pelycomys • †Penetrigonias • †Penetrigonias dakotensis • †Penosphyllum • †Penosphyllum cordatum • Penthetria • †Penthetria abacula – type locality for species • †Penthetria alderensis – type locality for species • †Penthetria rubiensis – type locality for species • †Peraceras • †Peraceras profectum • †Peraceras superciliosum • †Peradectes • †Peradectes elegans – or unidentified comparable form • †Peradectes minor – type locality for species • †Peradectes protinnominatus – or unidentified comparable form • †Peridiomys • †Peridiomys halis – type locality for species • †Periptychus • †Perognathoides • †Perognathoides eurekensis – or unidentified comparable form • Perognathus • †Perognathus ancenensis – type locality for species • Peromyscus • †Peromyscus maniculatus – or unidentified comparable form • Persea • †Persea brossiana • †Petauristodon • †Phasmatopelecinus – type locality for genus • †Phasmatopelecinus leonae – type locality for species • †Phenacodaptes – or unidentified comparable form • †Phenacodaptes sabulosus • . Charles R. Knight (1898). †Phenacodus'' • †Phenacodus bisonensis • †Phenacodus intermedius • †Phenacodus magnus • Phragmites • †Phragmites alaskana • †Phthiria • †Phthiria fossa – type locality for species • †Phyllites • †Phyllites demoresi • †Phyllites disturbans • Picea • †Picea lahontensis • †Picea magna • †Picea sonomensis • †Piceoerpeton • †Piceoerpeton willwoodense • †Picrodus • †Picrodus canpacius • †Picrodus silberlingi – type locality for species • , or pine tree Pinus'' • †Pinus florissanti • †Pinus wheeleri • †Pipestoneia – type locality for genus • †Pipestoneia douglassi – type locality for species • †Pipestoneomys • †Pipestoneomys bisulcatus • †Pithecolobium • †Pithecolobium eocenicum • †Planatus • †Planatus nobilis • †Planatus raynoldsi • †Planetetherium • †Planetetherium mirabile – type locality for species • †Plastomenoides – type locality for genus • †Plastomenoides lamberti – type locality for species • †Plastomenoides tetanetron – type locality for species • †Plastomenus – or unidentified comparable form • Platanus • †Platanus dissecta • †Platanus nobilis • †Platanus raynoldsi • †Platanus raynoldsii • †Platanus stenoloba • Plecia • †Plecia inflata – type locality for species • †Plesiadapis'' • †Plesiadapis anceps – type locality for species • †Plesiadapis churchilli – type locality for species • †Plesiadapis praecursor – type locality for species • †Plesiadapis rex – type locality for species • †Plesiolestes • †Plesiolestes problematicus • †Pleurolicus • †Plioceros • †Plioceros blicki – or unidentified comparable form • †Pliohippus • †Plionictis • †Plionictis ogygia • †Plithocyon • †Plithocyon ursinus • †Poacites • †Poebrotherium • †Poebrotherium eximium – or unidentified comparable form • †Poebrotherium wilsoni • †Pogonodon'' • †Ponerites • †Ponerites kishenehne – type locality for species • Populus • †Populus adamantea • †Populus balsamoides • †Populus cedrusensis • †Populus cinnamomoides • †Populus eotremuloides • †Populus lindgreni • †Populus nebrascensis • †Populus payettensis • †Populus washoensis • †Potamanthellus • †Potamanthellus rubiensis – type locality for species • †Potentilla • †Potentilla horkelioides • †Potentilla salmonensis • †Pradjidaumo • †Pradjidaumo trilophus • †Preissites • †Preissites wardi • †Preissites wardii • †Procerberus • †Procerberus formicarum – type locality for species • †Procerberus grandis – or unidentified comparable form • †Procerberus plutonis • †Prochetodon • †Prochetodon foxi – type locality for species • †Prodesmodon • †Prodesmodon copei • †Prodiacodon • †Prodiacodon concordiarcensis – type locality for species • †Prodiacodon crustulum – type locality for species • †Prodiacodon furor – type locality for species • †Proiridomyrmex'' • †Proiridomyrmex rotundatus – type locality for species • †Prokalotermes • †Prokalotermes alderensis – type locality for species • †Promerycochoerus • †Promerycochoerus superbus • †Promioclaenus • †Promioclaenus acolytus • †Pronodens • †Pronodens silberlingi – type locality for species • †Pronothodectes • †Pronothodectes matthewi – type locality for species • †Propalaeosinopa • †Propalaeosinopa albertensis • †Proscalops • †Proscalops intermedius – type locality for species • †Prosciurus • †Prosciurus parvus – or unidentified comparable form • †Prosciurus vetustus – type locality for species • †Prosphyracephala • †Prosphyracephala rubiensis – type locality for species • †Protazteca'' • †Protazteca eocenica – type locality for species • †Protentomodon • †Protentomodon ursirivalis – type locality for species • †Prothryptacodon • †Prothryptacodon furens – type locality for species • †Protictis • †Protictis haydenianus • †Protictis microlestes • †Protochriacus • †Protochriacus simplex • †Protohippus'' • †Protolabis • †Protolabis gracilis – or unidentified comparable form • †Protoreodon • †Protoreodon pearcei • †Protoreodon pumilus • †Protungulatum • †Protungulatum donnae • †Protungulatum gorgun – type locality for species • †Protungulatum sloani – type locality for species • †Provaranosaurus – or unidentified comparable form • †Proxestops • †Proxestops silberlingi • †Proxestops silberlingii – type locality for species • Prunus • †Prunus careyhurstia • †Prunus corrugis • †Prunus lyoniifolia – type locality for species • †Prunus morangensis • †Prunus perita • †Prunus scottii • †Prunus wilcoxiana • †Pseudhipparion'' • †Pseudocylindrodon • †Pseudocylindrodon medius – type locality for species • †Pseudocylindrodon neglectus – type locality for species • †Pseudolarix • †Pseudolarix americana • †Pseudomesoreodon – type locality for genus • †Pseudomesoreodon rooneyi – type locality for species • Pseudomyrmex • †Pseudomyrmex saxulum – type locality for species • †Pseudotettigonia • †Pseudotettigonia leona – type locality for species • †Pseudotheridomys • †Pseudotrimylus • †Pseudotsuga • †Pseudotsuga longifolia • †Pseudotsuga sonomensis • †Psittacotherium'' • †Psittacotherium multifragum • Ptelea • †Ptelea miocenica • †Ptenidium • †Ptenidium kishenehnicum – type locality for species • Pteris • Pterocarya • †Pterocarya hispida • †Ptilodus • †Ptilodus kummae • †Ptilodus montanus – type locality for species • †Ptilodus tsosiensis • †Purgatorius'' • †Purgatorius janisae – type locality for species • †Purgatorius titusi – type locality for species • †Purgatorius unio – type locality for species • †Pyracantha • †Pyracantha spatulata – type locality for species ==Q==

• , or oak tree Quercus'' • †Quercus convexa • †Quercus dayana • †Quercus dispersa – tentative report • †Quercus eoprinus • †Quercus hannibali • †Quercus prelobata • †Quercus prevariabilis • †Quercus pseudolyrata • †Quercus simulata • †Quercus sullyi • †Quercus winstanleyi ==R==

• †Rana – or unidentified comparable form • Rangifer • , or reindeer †Rangifer tarandus'' • †Rhamnites • †Rhamnites pseudostenophyllus • †Rhamnus • †Rhamnus cleburni • †Rhamnus crocea • †Rhamnus hirsuta • Rhus • †Rhus milleri • †Rhus miosuccedanea • †Rhus obscura • †Rhus praeovata • †Rhus stellariaefolia • †Robinia • †Robinia californica • †Robinia lesquereuxi • Rosa • †Rosa hilliae ==S==

• Sabal • †Sabal grayana • †Sabal imperialis • †Sabal powelli • †Saccoloma • †Saccoloma gardneri • , or willow Salix'' • †Salix aquilina • †Salix cockerelli • †Salix hesperia • †Salix knowltoni • †Salix laevigatoides • †Salix longiacuminata • †Salix schimperi • †Salix stipulata – type locality for species • †Salix succorensis • †Salix taxifolioides • †Salix truckeana • †Salix wildcatensis • †Salix wimmeriana • †Sambucus • †Sambucus newtoni • †Sapindus • †Sapindus coloradensis • Sassafras • †Sassafras ashleyi • †Sassafras columbiana • †Sassafras hesperia'' • †Sassafras thermale • †Scalopoides • †Scapherpeton • †Scapherpeton tectum • †Scaphohippus • †Scaphohippus intermontanus – or unidentified comparable form • †Scenopagus • †Schizotheriodes • †Schizotheriodes parvus – type locality for species • †Scotiophryne – or unidentified comparable form • †Scottimus • †Scottimus longiquus – type locality for species • †Scottimus viduus • †Selaginella • †Selaginella collieri • †Selaginella monstrosa • †Senoprosopis • †Senoprosopis beckeri – type locality for species • Sequoia • †Sequoia affinis'' • †Sespemys – tentative report • †Simoedosaurus • †Simpson • †Simpson lists • †Simpsonictis • †Simpsonictis tenuis • †Smilax • †Smilax trinervis • †Solenopsites • †Solenopsites abdita – type locality for species • †Sophora • †Sophora spokanensis • †Sorbus • †Sorbus harneyensis • †Sparganium • †Sparganium antiquum • Spea • †Spea neuter • Spermophilus • †Spermophilus jerae – type locality for species • †Spermophilus primitivus • †Spermophilus richardsonii • †Spiraea • †Spiraea clavidens • †Spiraea decurrens • †Stelocyon • †Stelocyon arctylos – type locality for species • †Steneofiber • †Steneofiber gradatus – or unidentified comparable form • †Steneofiber hesperus • †Stenoechinus • †Stenoechinus tantalus – type locality for species • †Stenomylus'' • †Stenomylus hitchcocki – or unidentified comparable form • Sterculia • †Sterculia wilcoxiana • †Stibarus • †Stibarus montanus – type locality for species • †Stilpnodon • †Stilpnodon simplicidens – type locality for species • †Stygimys • †Stygimys camptorhiza – or unidentified comparable form • †Stygimys gratus • †Stygimys jepseni – type locality for species • †Stygimys kuszmauli – type locality for species • . Robert Bruce Horsfall (1913). †Subdromomeryx'' • †Subdromomeryx antilopinus • †Subhyracodon • †Subhyracodon mitis • †Subhyracodon occidentalis • †Submerycochoerus • †Submerycochoerus bannackensis – type locality for species • Sylvicola – or unidentified related form • †Sylvicola fenestralis • Sylvilagus • †Sylvilagus nuttallii • †Symplocarpus • †Symplocarpus prefoetidus ==T==

• †Taeniolabis'' • †Taeniolabis lamberti – type locality for species • †Tapocyon • †Tapocyon robustus • †Tardontia • †Tardontia occidentale – or unidentified comparable form • Taricha • †Taricha miocenica – type locality for species • Taxodium • †Taxodium dubium • †Taxodium olriki • †Tectochara • †Tectochara grambastorum • †Teleoceras'' • †Tenudomys – tentative report • †Tephrodytes – type locality for genus • †Tephrodytes brassicarvalis – type locality for species • †Ternstroemites • †Ternstroemites aureavallis • †Tetraclaenodon • †Tetraclaenodon puercensis • Thomomys • †Thomomys taloides • , or northern pocket gopher †Thomomys talpoides'' • †Thrinax • †Thrinax dorfi • †Thryptacodon • †Thryptacodon australis – or unidentified comparable form • †Thryptacodon orthogonius – tentative report • †Thryptacodon pseudarctos – type locality for species • †Thuja • †Thuja dimorpha • †Thuja interrupta • †Thylacodon • †Thylacodon montanensis – type locality for species • †Thylacodon pusillus – or unidentified comparable form • †Ticholeptus • †Ticholeptus zygomaticus • Tilia • †Tilia aspera • †Tilia inaequalis • †Tinuviel • †Tinuviel eurydice • Tipula • †Tipula carolae – type locality for species • †Tipula rubiensis – type locality for species • †Titanoides'' • †Titanoides gidleyi • †Trapa • †Trapa angulata • †Trapa paulula • †Tricentes • †Tricentes subtrigonus • †Trigenicus • †Trigenicus profectus • †Trigonias • †Trigonias osborni • †Trilaccogaulus • †Trilaccogaulus montanensis • †Triplopides • †Triplopides rieli – type locality for species • †Triplopus • †Triplopus rhinocerinus – or unidentified comparable form • †Trochodendroides • †Trochodendroides flabella • †Trogolemur – tentative report • †Tropidia • †Tropidia tumulata – type locality for species • †Tullochelys • †Tullochelys montana • †Tylocephalonyx • Typha • †Typha lesquereuxi ==U==